import time
from datetime import datetime, timedelta

from flask import request, render_template, session, redirect, url_for, current_app, g, jsonify

from info import constants, db
from info.models import User, News, Category
from info.utils.common import user_login_data
from info.utils.image_storage import storage
from info.utils.response_code import RET
from . import admin_blu

@admin_blu.route('/index')
@user_login_data
def admin_index():
    """后台首页"""
    user = g.user
    return render_template('admin/index.html',user=user.to_dict())



@admin_blu.route('/login',methods=['GET','POST'])
def login():
    """后台管理系统登录页"""
    if request.method == 'GET':
        user_id = session.get('user_id')
        password = session.get('password')
        if user_id and password:
            # 判断是否登陆过，若已登录过，则直接返回至后台首页
            return redirect(url_for('admin.admin_index'))
        return render_template('admin/login.html')

    # 获取参数 获取用户登录名及密码
    username = request.form.get('username')
    password = request.form.get('password')

    # 校验参数
    if not all([username,password]):
        return render_template('admin/login.html',errmsg='参数错误')
    try:
        # 根据用户名查询该用户是否存在
        user = User.query.filter(User.mobile == username).first()
    except Exception as a:
        current_app.logger.error(a)
        return render_template('admin/login.html',errmsg='参数错误')
    if not user:
        return render_template('admin/login.html', errmsg='用户不存在')
    if not user.check_passowrd(password):
        # 校验密码是否正确
        return render_template('admin/login.html',errmsg='用户名或密码错误')
    if not user.is_admin:
        # 若用户为管理员，则user表中is_admin字段为true，否则为false
        return render_template('admin/login.html',errmsg='用户权限错误')
    # 将登录信息保存到session中
    session['user_id'] = user.id
    session['nick_name'] = user.nick_name
    session['mobile'] = user.mobile
    session['is_admin'] = user.is_admin
    # 登录成功转跳至主页
    return redirect(url_for('admin.admin_index'))


@admin_blu.route('/user_count')
def user_count():
    """用户统计"""
    # 1、查询总人数
    total_count = 0
    try:
        total_count = User.query.filter(User.is_admin==False).count()
    except Exception as a:
        current_app.logger.error(a)
    # 2、用户月新增数
    mon_count = 0
    # 当月时间
    try:
        now = time.localtime()
        mon_begin = '%d-%02d-01' % (now.tm_year, now.tm_mon)
        mon_begin_date = datetime.strptime(mon_begin, '%Y-%m-%d')
        mon_count = User.query.filter(User.is_admin == False, User.create_time >= mon_begin_date).count()
    except Exception as a:
        current_app.logger.error(a)

    # 3、用户日新增数
    day_count = 0
    try:
        now = time.localtime()
        day_begin = '%d-%02d-%02d' % (now.tm_year, now.tm_mon, now.tm_mday)
        day_begin_date = datetime.strptime(day_begin, '%Y-%m-%d')
        day_count = User.query.filter(User.is_admin == False, User.create_time > day_begin_date).count()
    except Exception as e:
        current_app.logger.error(e)

    # 4、查询图表信息
    # 获取当天0点的时间
    now_date = datetime.strptime(datetime.now().strftime('%Y-%m-%d'), '%Y-%m-%d')
    # 定义空数组，保存数据
    active_date = []
    active_count = []

    # 依次添加数据，再反转
    for i in range(0, 31):
        begin_date = now_date - timedelta(days=i)
        end_date = now_date - timedelta(days=(i - 1))
        active_date.append(begin_date.strftime('%Y-%m-%d'))
        count = 0
        try:
            count = User.query.filter(User.is_admin == False, User.last_login >= begin_date,
                                      User.last_login < end_date).count()
        except Exception as e:
            current_app.logger.error(e)
        active_count.append(count)

    active_date.reverse()
    active_count.reverse()
    data = {
        "total_count":total_count,
        "mon_count":mon_count,
        "day_count":day_count,
        "active_date":active_date,
        "active_count":active_count
    }
    return render_template('admin/user_count.html',data=data)


@admin_blu.route("/user_list")
def user_list():
    """获取用户列表"""
    # 获取参数
    page = request.args.get("p")
    try:
        page = int(page)
    except Exception as a:
        current_app.logger.error(a)
        page = 1
    # 设置变量默认值
    users = []
    current_page = 1
    total_page = 1

    # 查询数据 按照时间倒序排列
    try:
        paginate = User.query.filter(User.is_admin == False).order_by(User.last_login.desc()).paginate(page, constants.ADMIN_USER_PAGE_MAX_COUNT,                                                                                           False)
        users = paginate.items
        current_page = paginate.page
        total_page = paginate.pages
    except Exception as e:
        current_app.logger.error(e)
    user_list = [ item.to_admin_dict() for item in users]
    context = {
        "current_page":current_page,
        "total_page":total_page,
        "user_list":user_list
    }
    return render_template('admin/user_list.html',data=context )

@admin_blu.route('/news_review')
def news_review():
    """新闻审核页面"""
    page = request.args.get("p", 1)
    keyword = request.args.get("keyword", None)
    try:
        page = int(page)
    except Exception as e:
        current_app.logger.error(e)
        page = 1

    news_list = []
    current_page = 1
    total_page = 1
    filters = [News.status != 0]
    if keyword:
        filters.append(News.title.contains(keyword))
    try:
        paginate = News.query.filter(*filters) \
            .order_by(News.create_time.desc()) \
            .paginate(page, constants.ADMIN_NEWS_PAGE_MAX_COUNT, False)

        news_list = paginate.items
        current_page = paginate.page
        total_page = paginate.pages
    except Exception as e:
        current_app.logger.error(e)

    news_dict_list = []
    for news in news_list:
        news_dict_list.append(news.to_review_dict())

    context = {"total_page": total_page, "current_page": current_page, "news_list": news_dict_list}

    return render_template('admin/news_review.html', data=context)

@admin_blu.route('/news_review_detail',methods=['GET','POST'])
def news_review_detail():
    """新闻审核详情页"""
    if request.method == 'GET':
        news_id = request.args.get('news_id')
        if not news_id:
            return render_template('admin/news_review_detail.html', data={"errmsg": "未查询到此新闻"})
        news = None
        try:
            news = News.query.get(news_id)
        except Exception as a :
            current_app.logger.error(a)

        if not news:
            return render_template('admin/news_review_detail.html', data={"errmsg": "未查询到此新闻"})

        return render_template('admin/news_review_detail.html',data =  {"news": news.to_dict()})

    # 获取参数
    news_id = request.json.get('news_id')
    action = request.json.get('action')
    # 校验参数
    if not all([news_id,action]):
        return jsonify(errno=RET.PARAMERR,errmsg='参数错误')
    if action not in ("accept", "reject"):
        return jsonify(errno=RET.PARAMERR,errmsg='参数错误')
    try:
        news = News.query.get(news_id)
    except Exception as a:
        current_app.logger.error(a)
        return jsonify(errno=RET.DBERR,errmsg='数据库查询错误')
    if not news:
        return jsonify(errno=RET.DATAERR,errmsg='新闻数据不存在')
    if action == 'accept':
        news.status = 0
    else:
        reason = request.json.get('reason')
        if not reason:
            return jsonify(errno=RET.PARAMERR,errmsg='参数错误')
        news.reason = reason
        news.status = -1
    return jsonify(errno=RET.OK, errmsg='ok')

@admin_blu.route('/news_edit')
def news_edit():
    """新闻版式编辑：返回新闻列表"""

    page = request.args.get("p", 1)
    keywords = request.args.get("keywords", "")
    try:
        page = int(page)
    except Exception as e:
        current_app.logger.error(e)
        page = 1

    news_list = []
    current_page = 1
    total_page = 1

    try:
        filters = []
        # 如果有关键词
        if keywords:
            # 添加关键词的检索选项
            filters.append(News.title.contains(keywords))

        # 查询
        paginate = News.query.filter(*filters) \
            .order_by(News.create_time.desc()) \
            .paginate(page, constants.ADMIN_NEWS_PAGE_MAX_COUNT, False)

        news_list = paginate.items
        current_page = paginate.page
        total_page = paginate.pages
    except Exception as e:
        current_app.logger.error(e)

    news_dict_list = []
    for news in news_list:
        news_dict_list.append(news.to_basic_dict())

    context = {"total_page": total_page, "current_page": current_page, "news_list": news_dict_list}

    return render_template('admin/news_edit.html', data=context)


@admin_blu.route('/news_edit_detail',methods=['GET','POST'])
def news_edit_detail():
    """新闻编辑详情"""
    if request.method=='GET':
        # 获取参数
        news_id = request.args.get("news_id")
        if not news_id:
            return render_template('admin/news_edit_detail.html', data={"errmsg": "未查询到此新闻"})
        # 查询新闻
        news = None
        try:
            news = News.query.get(news_id)
        except Exception as e:
            current_app.logger.error(e)
        if not news:
            return render_template('admin/news_edit_detail.html', data={"errmsg": "未查询到此新闻"})
        # 查询分类的数据
        categories = Category.query.all()
        categories_li = []
        for category in categories:
            c_dict = category.to_dict()
            c_dict["is_selected"] = False
            if category.id == news.category_id:
                c_dict["is_selected"] = True
            categories_li.append(c_dict)
        # 移除`最新`分类
        categories_li.pop(0)
        data = {"news": news.to_dict(), "categories": categories_li}
        return render_template('admin/news_edit_detail.html', data=data)
    # 获取参数
    news_id = request.form.get("news_id")
    title = request.form.get("title")
    digest = request.form.get("digest")
    content = request.form.get("content")
    index_image = request.files.get("index_image")
    category_id = request.form.get("category_id")
    # 校验参数
    # 1.1 判断数据是否有值
    if not all([title, digest, content, category_id]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数有误")
    news = None
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
    if not news:
        return jsonify(errno=RET.NODATA, errmsg="未查询到新闻数据")

    # 1.2 尝试读取图片
    if index_image:
        try:
            index_image = index_image.read()
        except Exception as e:
            current_app.logger.error(e)
            return jsonify(errno=RET.PARAMERR, errmsg="参数有误")

        # 2. 将标题图片上传到七牛
        try:
            key = storage(index_image)
        except Exception as e:
            current_app.logger.error(e)
            return jsonify(errno=RET.THIRDERR, errmsg="上传图片错误")
        news.index_image_url = constants.QINIU_DOMIN_PREFIX + key
    # 3. 设置相关数据
    news.title = title
    news.digest = digest
    news.content = content
    news.category_id = category_id

    # 返回响应
    return jsonify(errno=RET.OK,errmsg='ok')


@admin_blu.route('/news_category',methods=['POST','GET'])
def get_news_category():
    """新闻分类页 对分类进行修改或添加"""
    if request.method == 'GET':
        # 获取所有的分类数据
        categories = Category.query.all()
        category_list = [ category.to_dict() for category in categories]
        category_list.pop(0)
        data = {
            'category_list':category_list
        }
        return render_template('admin/news_type.html',data=data)

    # 获取参数
    c_name = request.json.get('name')
    c_id = request.json.get('id')
    if not c_name:
        return jsonify(errno=RET.PARAMERR,errmsg='参数错误')
    if c_id:
        # 若分类id存在 判断分类名称是否存在，若存在直接修改，否则返回异常
        try:
            category = Category.query.get(c_id)
        except Exception as a:
            current_app.logger.error(a)
            return jsonify(errno=RET.DBERR,errmsg='数据库查询错误')
        if not category:
            return jsonify(errno=RET.DATAERR,errmsg='数据不存在')
        category.name = c_name
    else:
        # 若分类id不存在，则直接添加分类
        category = Category()
        category.name = c_name
        db.session.add(category)

    # 返回成功响应
    return jsonify(errno=RET.OK,errmsg='ok')



